whats the actual difference between the 2 knots.
by the time this guy piss farts around and gets the knot done the fish will be in the next suburb..

As I can see it - the FG has alternating criss cross wraps along the leader- and the PR does 20 wraps the same way up the leader and then 20 back down over the top of those wraps.

Those type of knots are the ones you tie once the night before and dont have to worry about - because if you get your leader and braid strengths right - the weakest knot on your leader is attached to the lure - so that breaks before your leader knot does.

As I can see it - the FG has alternating criss cross wraps along the leader- and the PR does 20 wraps the same way up the leader and then 20 back down over the top of those wraps.....

Yep, and pretty sure there is almost no difference in knot strength. Both knots will fail eventually if cast repeatedly through the rod guides and the top loop or wrap (red arrow) is damaged. After all, one of the reasons these knots are so good is that they are slim with the leader tag facing back down the mainline and cast a dream.

If the top wrap/loop fails the knot unravels and it is for this reason that I prefer the FG. The best way to protect the top wrap is to make sure that it is cinched really tight onto the leader and bites in below the surface, and I find that the over/under wrapping on an FG is better for this than the spiral up-spiral down wraps of the PR.

I have found that tightening the PR the bottom loops (blue arrow) get really tight but sometimes leave the top loop a bit looser and more prone to guide damage.

Most do a FG short where the PR is usually 3-4 times the length,i do mine using a bobbin.PR would be around 20% stronger,usually all my lines are 20,25 or 30lb for mullies.Smaller species i go with double uni's.

Yep, and pretty sure there is almost no difference in knot strength. Both knots will fail eventually if cast repeatedly through the rod guides and the top loop or wrap (red arrow) is damaged. After all, one of the reasons these knots are so good is that they are slim with the leader tag facing back down the mainline and cast a dream.

If the top wrap/loop fails the knot unravels and it is for this reason that I prefer the FG. The best way to protect the top wrap is to make sure that it is cinched really tight onto the leader and bites in below the surface, and I find that the over/under wrapping on an FG is better for this than the spiral up-spiral down wraps of the PR.

I have found that tightening the PR the bottom loops (blue arrow) get really tight but sometimes leave the top loop a bit looser and more prone to guide damage.

Just my 2cworth.

Yeah maybe the length of those PR's give them something extra in dry land scale tests

Most do a FG short where the PR is usually 3-4 times the length,i do mine using a bobbin.PR would be around 20% stronger,usually all my lines are 20,25 or 30lb for mullies.Smaller species i go with double uni's.

Yeah sounds like the PR's length would make it a good knot to troll with but not so great with casting.

I know there are blokes who only do 12 wraps with their fgs, to keep the knot as short as possible for casting

Yeah sounds like the PR's length would make it a good knot to troll with but not so great with casting.

I know there are blokes who only do 12 wraps with their fgs, to keep the knot as short as possible for casting

Always depends on what line thickness is being used on braid and leader to how thick the knot will be,do you want the knot to wind on the spool or just sit in front.How many guides and how small are they on the rod usually BC rods are smaller,just different circumstances for every fisho to work out for the best outcome. Remembering FG & PR are meant to be the thinnest & strongest knots to date.
On some rods i can feel the knot coming through the guides rubbing like sandpaper,on other rods using the same reel not so noticeable.